Assigned Users and Profiles are users or Profiles who will utilize this configuration when Assigned.

Data Sets - will allow users to define what records are synced based on predetermined filters(Lightning Sync Configuration)

After your Salesforce admin initiates contacts sync for you, Lightning Sync creates a group in Google Contacts called Salesforce Sync. Any contacts that have synced from Salesforce to Google are found in the Salesforce Sync group. Gmail accesses those contacts automatically when you attempt to email or chat with those contacts. Or if you’re set up to sync from Google Contacts to Salesforce, you can add Google Contacts to the Salesforce Sync group, and Lightning Sync starts syncing the contact with Salesforce during the next sync cycle. Don’t rename, move, or delete the Salesforce Sync group, or syncing between Salesforce and Google Contacts could stop.

Considerations & Limitations

Lightning for Gmail does not automatically relate emails to contact records. The manual step of adding the email to the contact and/or affiliated record is required.

Lightning for Gmail does not automatically sync and create contact records if they are not yet in Apto.

Lightning for Gmail does not automatically sync calendar events from Apto to Google Calendar and vice versa, but it can be done manually. If you want this done automatically, set up the Lightning Sync.